| 1 | E.G.L. Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 2 | Eado Production, Inc. | Kermit, TX 79745 | Oil & Gas Operator | Aug 2012 |
| 3 | Eagle Rock Operating Company,LLC | Houston, TX 77252 | Oil & Gas Operator | Oct 2015 |
| 4 | Earthstone Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Mar 2025 |
| 5 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 6 | Encore Permian Operating, LLC | Uvalde, TX 78801 | Oil & Gas Operator | Jun 2025 |
| 7 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Jun 2025 |
| 8 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 9 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Jan 2025 |
| 10 | Energy Transfer Fuel, LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2005 |
| 11 | Enexco, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Mar 2017 |
| 12 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 13 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 2025 |
| 14 | Eqv Operating LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | Jun 2025 |
| 15 | Erin Oil Co. | Midland, TX 79707 | Oil & Gas Operator | Jun 2025 |
| 16 | Estoril Producing Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 1994 |
| 17 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 18 | Etc Field Services LLC | San Antonio, TX 78258 | Oil Operator | Jun 2018 |
| 19 | Etc Oil Co. | Pecos, TX 79772 | Oil & Gas Operator | Mar 2004 |
| 20 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 21 | Evinger, Ernest E. | Midland, TX 79705 | Oil & Gas Operator | Mar 2002 |
| 22 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Jun 2025 |
| 23 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 24 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Jun 2025 |